Spindle Drive Weight Compensator With Linear Compression Springs
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Solution Overview
Problem
Existing weight balancers using spiral springs have limited capacity for load compensation and are difficult to adjust for specific weights due to non-linear spring force curves and self-locking issues with classic threads, making them unsuitable for a broader weight range and precise preload settings.
Innovation Solution
A weight compensator utilizing a spindle gear with compression springs that exhibit linear spring force curves, combined with a movement thread to convert rotational movements into longitudinal movements, allowing for adjustable preload and higher load capacity, and featuring a design that prevents twisting and distributes force evenly across multiple springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If coil springs are used in weight compensators, then the design is simple, but the maximum load-bearing capacity relative to the size is relatively small
Solution Approach 1:
The patent replaces the traditional coil spring mechanical system with a compression spring system combined with a spindle drive mechanism. This substitution allows the system to achieve higher load-bearing capacity while maintaining design simplicity, as compression springs can be designed to cushion very large weight forces without the spatial constraints of coil springs.
Solution Approach 2:
The patent transitions from the bending deflection mode of coil springs to the axial compression mode of compression springs. This dimensional change in the spring deformation direction enables the system to handle larger forces more efficiently, as compression springs can be designed to cushion very large weight forces along their longitudinal axis.
2Ease of manufacture
If coil springs are used in weight compensators, then the design is simple, but adjusting the preload to adapt to expected component weight is difficult
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism through the spindle drive system that allows the preload of compression springs to be easily adjusted. The spindle drive with translation element and rotation element enables continuous adjustment of the spring compression, making the system adaptable to different component weights while maintaining a simple overall design.
Solution Approach 2:
The patent enables easy adjustment of the spring preload parameter through the spindle drive mechanism. By rotating the rotation element, the translation element moves linearly to adjust the compression of the springs, allowing the system to adapt to different expected component weights by changing the preload parameter.
3Force
If compression springs are used in weight compensators, then the load-bearing capacity and adjustability are improved, but a transmission mechanism is required to convert tensile force to compressive force
Solution Approach 1:
The patent uses the spindle drive mechanism as an intermediary to convert the tensile force from the suspended component into compressive force on the springs. The thread between the rotation element and translation element acts as the intermediary that transforms rotational movement into longitudinal compression movement, enabling the use of compression springs while managing the added complexity through an efficient transmission design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables effective compensation of larger weight ranges with precise adjustment capabilities, reducing self-locking and friction, and providing a more reliable and adaptable solution for handling heavy components.
Implementation Method 1
at least one compression spring which is connected at one of its ends – at least indirectly – to the translation element of the spindle drive. The compression spring is compressible by means of the translation element when the rotation element is rotated by the component weight
Implementation Method 2
compression springs, when subjected to compression along their longitudinal axis, exhibit a spring force increase proportional to the deflection along the longitudinal axis, i.e., a linear spring force curve
Implementation Method 3
A thread, preferably with a predetermined thread pitch, is preferably arranged between the rotating element and the translational element to facilitate this conversion
Data Source
Figure 1~2
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AI summary
The invention relates to a weight compensator (1) for a movable component with a component weight, comprising a spindle drive (32) to whose rotation element (34) the component can be suspended, and at least one compression spring (30) which is connected at one of its ends (29) to a translation element (36) of the spindle drive, wherein the compression spring is compressible by means of the translation element when the rotation element is rotated by the component weight.